Alloy



silicon could be made into a .{periodic system JOHN G. ROMAN, or STEUBENVILLE, OHIO, ASSIGNOR, BY

WILLIAM H. KELLER, OF NORTON, VIRGINIA.

ALLOY.

No Drawing.

To all whom it may concern:

Be it known that I, JOHN Gr. HOMAN, a citizen of the United States, and a resident of Steubenville, in the county of Jefferson and State of Ohio, have invented a new and useful Improvements in Alloys; and I do hereby declare the following to be a full, clear, and exact description thereof.

My invention relates to alloys and has special reference to an iron alloy for use in the production of sheets or plates for punched or stamped resistance grids, such as is shown and described in United States Letters Patent granted to William H. Keller, No. 1,184,706, dated May 23, 1916, andNo. 1,240,457, dated September 18, 1917.

In the practice of producing resistance grids, such as is done under the stamping or punching process from sheets or plates, it was contemplated by the above mentioned patents to use only steel. for such purpose, and it has been found that certain steels or alloys have a higher resistance than ordinary steel and from this point of View would be desirable material, but it has also been found in practice that a steel containing say five (5%) per cent. of silicon cannot be satisfactorily punched into such grids of desirable thickness without excessive breakage.

The object of my invention is to provide an iron alloy which will overcome 'such.objections and give the desired resistance for suchgrids by producing a punchable material of electrical resistance superior to iron.

To these ends my invention consists, generally stated, in the novel form of an alloy as hereinafter more specifically set forth and described and particularly pointed out in the claims.

To enable others skilled in the art to which my invention appertains to construct and use my' improved alloy, I will describe the same more fully.

It is known that iron when alloyed with rather inexpensive alloy but for its brittleness. On the other hand, those alloys of iron formed from elements of even numbered series of the produced alloys of mechanical strength, although it is known, however, that alloys of even series were objectionable as regards magnetic value.

Specification of Letters Patent.

application filed January 3, 1920. Serial No.

.silicon 1% to 6% and 1%, the relation of the silicon and man- An alloy of iron and silicon is'produced in the ordinary Way by adding suflicient silicon to make the resistance desired; If a relatively high specific resistance is desired it is aimed to get-say five (5%) per cent. silicon, and if a medium resistance is desired it is aimed to get say two (2%) per cent. silicon. To this material, as thus prepared, manganese to the extent needed is arded to secure mechanical working, and the two (2%) per cent. silicon alloy will not require more than 20% manganese, while the live (5%) require one (1 0) per cent. toget results. However, it is not desired to be limited to manganese to gain such results as it has been" found that carbon may be avaluable adjunct and the use of it valuable in making grid material, so that the addition of .10% to 25% carbon in some alloys is advantageous.

Various other changes and additions and eliminations of materials may be resorted to, without departing from the spirit of the invention or sacrificing any of its advantages, and obviously the normal content of other elements exist, as impurities in steel, and are not considered as part of this invention. I

What I claim as my-invention and desire to secure by Letters Patent is: I

1. An alloy of iron and silicon having an electrical resistance superior to iron and of punchable quality, consisting of iron, silicon 1% to 6% and manganese .20% to 1%, the relation of the silicon and manganese be ing such, as one of them is increased or diminished, the other is also more or less increased or diminished.

2. An alloy of iron and silicon havin an electric resistance superior to iron and of punchable quality, and consisting of iron MESNE ASSIGNMENTS, 'ro

Patented Sept. *7, 1920;

per cent. silicon alloy may silicon 1% to 6%, carbon 10% to 25% an manganese 20% to 1%, the relation of the of them is increased or diminished, the other is also more or less increased or diminished.

3. In a resistance grid, rheostat or similar appliance, an alloy of iron and silicon having an electrical resistance superior to iron and of punchable qualit conslsting of iron, manganese .20% to ganese being such, as one of them is increased or diminished, the other is also more or less increased or diminished.

4. In a resistance grid, rheostat or other similar appliance, an alloy of iron and silicon having an electrical resistance superior to iron and of punchable quality, consisting of iron, silicon 1% to 6%, carbon .10% to 25% and manganese .20% to 1%, the relation of the silicon and manganese being 10 such, as one of them is increased or diminished, the other is also more or less increased or diminished.

In testimony whereof I, the said JOHN Gr. HoMAN, have hereunto set my hand.

JOHN G. HOMAN. Witness:

J. M. GEOGHEGAN. 

